Spray nozzle



July 31,.1945. H. s. GARABEDIAN SPRAY NOZZLE Filed Jan. 26, 1944 I i '4a I v Patented July 31, 1945 UNITED STATES PATENT OFFICE SPRAY NOZZLEHaig S. Garabedian, Watertown, Mass.

Application January 26, 1944, Serial No. 519,707

6 Claims.

This invention relates to spraying apparatus, and is especiallyconcerned with the nozzle constructions of apparatus of this type.

In spraying insecticides, fungicides, and the like, on plants,shrubbery, and other vegetation, it is difficult to direct the sprayagainst the lower sides of the leaves where it is needed fully as muchas on the upper surfaces. The present invention aims to devise a nozzlestructure with the aid of which this result can be effectivelyaccomplished, in addition to providing the normal range of adjustment ofthe spray.

The nature of the invention will be readily understood from thefollowing description when read in connection with the accompanyingdrawing, and the novel features will be particularly pointed out in theappended claims;

In the drawing,

Fig, 1 is a side elevation of a nozzle structure embodying thisinvention;

Figs. 2 and 3 are horizontal, sectional views taken on the lines 2-2 and3-3, respectively, of Fig. 1;

Fig. 4 is a sectional view taken on the line 44, Fig. 2;

Figs. 5 and 6 are end views of the nozzle illustrated in Fig. 2 showingit in different positions of adjustment;

Fig. 7 is a sectional view on the line 1-1, Fig. 8; and

Fig. 8 is a view similar to Fig. 6 but showing the parts on a greatlyenlarged scale and with the cap broken away.

Referring first to Figs. 1, 2 and 3, the nozzle structure there showncomprises a tubular body 2 preferably of considerable length so that itcan be handled conveniently and will discharge its spray at asubstantial distance from the operator. The left-hand end portion ofthis body is externally threaded to receive a correspondingly internallythreaded cap 3. In order to prevent leakage between these parts a collar4 is threaded on to the right-hand end portion of the cap 3 andcooperates with it to provide a stufiing box in which a packing 5 islocated. Thus by tuming up the collar 4 the packing can be compressedmore or less as required to provide a tight joint between the cap andthe body.

In this construction the body also includes an internal sliding plunger6, keyed to the end portion of the body so that it cannot rotaterelativelyto it. and this member is pressed constantly toward the leftby a spring I so that its flat end face always bears against theinternal fiat end face or the end portion of the cap 3.

The nozzle is intended to be connected to a hose in any convenientmanner, and a slidable plunger type valve 8 connects the body 2 with thehose connecting member ID. The plunger of this valve is normally heldclosed by a. spring II, but it can be opened convenientl simply bypressing down on the button or end I2 of the plunger.

The problem with which this invention is chiefly concerned is that ofdevising means whereby either solid stream or a spray can be delivered,as desired, and the spray can be adjusted to have a very fine mist-likecharacter and can either be directed straight ahead or laterally at anabrupt angle to the axis of the body portion of the nozzle.

This object is accomplished chiefly by making the cooperating orificesin the plunger 6 and cap 3 of unique forms and arranging them in a novelrelationship. As best shown in Figs. 5, 6, 7 and 8, the end of the cap 3has an elongated and somewhat arc-shaped orifice a. rormed through itwhich is provided at one extremity with a rounded end and terminates atits opposite end in a gradually tapered corner. As the end surfaces ofthe cap 3 extend away from the orifice a, they are bevelled as bestshown in Figs. 7 and B, so that these surfaces Iorm a very acute anglewith the inner end surface of the cap. In other words, the edges of thisorifice are sharp.

The plunger 6 has an orifice b rormed through it which tapers as itextends forwardly and ends in a snort cylindrical portion, the extremeouter end of which, however, is bevelled slightly, as shown at b in Fig.7.

It will be observed that the orifices inthe parts 3 and e aree'ccentrically disposed with reference to the axis or the nozzle body.This is clearly seen in Figs. 2 and a, it being observed that in thelatter figure the outline or the body 2 is shown by the dotted circle,and the center or axis of this copy is indicated at Z. The relationshipof the orifices is such that when they arepositioned as shown in Figs.'1 and 8, with the edge only of the left-hand end of the orifice a,overlapped very slightly on the bevelled end surface of the orifice b,the spray will be directed laterally at an abrupt angle to the axis ofthe nozzle body. At this time the spray is very line but if, now, thecap is turned in a counter-clockwise direction, Fig. 8, the spray willbecome coarser, until finally when the port or orifice b registers fullywith the orifice a, an approximately solid stream will be directedstraight ahead. When the cap is adjusted still further in a counter=clockwise direction, the end of the orifice b will be cut off more andmore as this adjusting movement progresses, thus creating a spray whichbecomes finer and finer. Finally when the only registering poritions ofthese two orifices are the corners a and b" of the respective orifices aand b, then the spray becomes an extremely fine mist and is directed ata very sharp angle laterally away from the axis of the nozzle. Theportion 2) is a lateral extension of the circum ferential bevel b sopositioned as to register with the corner a of the orifice a.

It will be evident from an inspection of Fig. 8 that the spray producedwith the ports positioned as there shown will be directed toward theright across the end of the nozzle, while that produced when the parts aand b register with each other will be directed toward the left. Theangle in the former case is approximately 45, while in the latter theangle is even greater. This is an important advantage in sprayinginsecticides and fungicides on shrubbery or foliage of any kind where itis important to wet the lower, as well as the upper, surfaces of theleaves, because it is merely necessary in spraying the under surfaces toadjust the ports a and b so that a spray of the desired character isproduced, and then to rotate the nozzle shaft or body 2, while held inthe hand, until it directs this spray upwardly. By moving it around inthe foliage while held in this position, it will effectively wet thelower surfaces of the leaves. Wetting the upper surfaces presents noproblem.

If, when the nozzle is adjusted for a very fine spray, or at any othertime, it should become plugged with undissolved material, it is merelynecessary to back up the cap slightly so as to produce a larger stream.This action will clear out the lodged material and permit thereadjustment of a fine spray or mist again.

Because the plunger 6 is constantly held against the inner end surfacesof the cap 3 by the spring 1, there is no opportunity for leakagebetween the end surfaces of these members, and the spray can readily becontrolled with a high degree of accuracy. The valve 8 also adds to theconvenience of operation of the device since it permits the instantshutting off or turning on of the water or spraying solution.

While I have herein shown and described a preferred embodiment of myinvention, it will beevident that the invention is susceptible ofembodiment in other forms without departing from the spirit or scopethereof.

Having thus described my invention, what I desire to claim as new is:

1. A spray nozzle comprising a tubular body and a cap mounted thereonfor relative rotative adjustment, one on the other, around an axisextending lengthwise of said tubular body, said body having a dischargeorifice in the end there of on which said cap is mounted and said caphaving a thin end wall provided with an orifice cooperating with that insaid body to control the flow of liquid through the nozzle, the twoorifices being eccentrically related to each other the orifice in saidcap being elongated laterally and terminating at one end in a graduallytapered bevelled corner, and the cooperating edge of the orifice in saidbody being bevelled to cooperate with said corner in directing a finespray at an abrupt angle laterally with reference to the axis oi saidbody.

ase eis 2. A spray nozzle comprising a tubular body id a cap mountedthereon for relative rotative e ljustment, one on the other, said bodyhaving a discharge orifice in the end thereof on which said cap ismounted and said cap having an orifice cooperating with that in saidbody to control the flow of liquid through the nozzle, the orifice insaid cap being elongated and terminating at one end in a graduallytapered bevelled corner and at its opposite end in a rounded bevellededge, and the orifice in said body being bevelled to cooperate with theends of said orifice in the cap in delivering a spray angled sharplytoward opposite sides of the nozzle, depending upon which end of saidcap orifice controls the spray.

3. A spray nozzle comprising a tubular body and a cap mounted thereonfor relative rotative adjustment, one on the other, around an axisextending lengthwise of said tubular body, said body having a dischargeorifice in the end thereof on which said cap is mounted and said caphaving a thin end wall provided with an orifice cooperating with that insaid body to control the flow of liquid through the nozzle, the twoorifices being eccentrically related to each other the orifice in saidcap being elongated laterally and having opposite ends shaped to producesprays delivered in approximately opposite lateral directions wherebythe direction utilized can be selected by the operator.

4. A spray nozzle comprising a tubular body and a cap mounted thereonfor relative rotative adjustment, one on the other, around an axisextending lengthwise of said tubular body, said body having adischargeorifice in the end thereof on which said cap is mounted and said caphaving a thin end wall provided with an orifice cooperating with that insaid body to control the flow of liquid through the nozzle, the twoorifices being eccentrically related to each other the orifice in saidcap having an enlarged central portion tapering toward at least one endand the outer edge of said orifice being bevelled whereby a solid streamor a fine spray can be delivered depending upon the adjustment of saidcap, the orifice in said body being bevelled to cooperate with a portionof the orifice in said cap in producing a fine spray angled sharply in alateral direction with reference to the axis of said body.

5. A nozzle according to preceding claim 1, in combination with meansfor holding the inner end surface of said cap and the end face of saidbody pressed yieldingly but firmly together.

6. A spray nozzle comprising a tubular body, a cap mounted on the end ofsaid body for rotative adjustment therearound, said body including aplunger mounted in the main portion of said body for sliding movementand having a hole extending longitudinally therethrough, means forholding said plunger against rotation in said body portion, a springforcing said plunger outwardly and holding the end face of the plungeragainst the inner end surface 01 the cap, said plunger and the end ofsaid can having outlet openings therethrough, eccentricaliy positioned,and so related that by rotation the cap the fiow of Water through thenozzle can be controlledand'the character of the can be adjusted.

HAIG S.

